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Table 7 Summary of the main effects found for the specific question Q2 (role of habitat of LTI verges) for each biological group (birds, small mammals, bats, other mammals, amphibians, and reptiles), LTI (roads, waterways, powerlines, and railways), and risk of bias (low or medium)

From: Can linear transportation infrastructure verges constitute a habitat and/or a corridor for vertebrates in temperate ecosystems? A systematic review

  Risk of bias Roads Waterways Powerlines Railways
Birds Low (3)
− or NS
[+ Molothrus ater]
(1)
NS or +
(3)
NS or +
[− forest interior species]
/
Medium (10)
Depends on species
(2)
+
(2)
NS
[− Iridoprocne bicolor]
/
Small mammals Low (4)
NS or +
[−]
/ (1)
NS or +
[− Antechinus agilis]
/
Medium (5)
NS or +
/ / (3)
NS
[+]
Bats Low / / / /
Medium (6)
Depends on species
(8)
NS or +
/ (1)
− or NS
Other mammals Low / / / /
Medium (2)
NS or +
/ (1)
NS or +
/
Amphibians Low / / / /
Medium / (1)
NS or +
[−]
/ /
Reptiles Low / (1)
NS or +
/ /
Medium / / / /
  1. No study about pipelines were included in the review. All outcomes related to abundance, diversity or demography were considered here but outcomes related to similarity between communities were not. The number of studies is indicated in parenthesis, “−” indicates a negative effect of exposure to LTI (i.e. lower biodiversity in LTI verges compared to similar habitats away from LTIs), “NS” statistically non-significant (P > 0.05) differences between LTI verges and similar habitats away from LTI, and “+” a positive effect of exposure to LTI (i.e. higher biodiversity in LTI verges compared to similar habitats away from LTIs). Effects indicated in brackets were exceptions to the main effects reported. Studies with no information on biological group [54] or with results mixed for several groups [76] were not included